The overall mVITO research program yielded the following results:
Energy Gap Modulations of PDW State
We discovered strong Δ(r) modulations in Bi2Sr2CaCu2O8+δ twith eight-unit-cell periodicity revealing a PDW in Bi2Sr2CaCu2O8+δ.
Nature 580, 657 (2020)
Atomic-scale Electronic Structure of the Cuprate Pair Density Wave State Coexisting with Superconductivity
We modeled eight-unit-cell periodic, pair density wave (PDW) plus d-wave superconductivity (DSC) consistent with experiments Bi2Sr2CaCu2O8.
PNAS 117, 14804 (2020).
Severe Dirac Mass Gap Suppression in Sb2Te3-based Quantum Anomalous Hall Materials =
Landau-level spectroscopic imaging= reveals why anomalous Hall effect in Sb2Te3-based FMTI materials is limited to temperatures below the energy scale 100 μeV (or ∼1 K).
Nano Lett 20, 8001-8007 (2020)
Multi-Atom Quasiparticle Scattering Interference for Superconductor Energy-Gap Symmetry Determination
We developed generalization of QPI approach with multiple impurity atoms, and demonstrate its utility.
Quantum Materials 6, 7 (2021).
Discovery of an Electron-Pair Density Wave State in a Transition-Metal Dichalcogenide
Scanned Josephson-tunnelling microscopy (SJTM) reveals a PDW state in TMD NbSe2.
Science 372, 1447 (2021)
Atomic-scale Visualization of Electronic Fluid Flow
We invented a electronic fluid flow visualization technique & visualized flow patterns in an electronic fluid.
Nature Materials 20, 1480 (2021)
Scattering Interference Signature of a Pair Density Wave State in the Cuprate Pseudogap Phase
We demonstrated scattering interference signature indicating that a pure PDW state occurs in the cuprate pseudogap phase.
Nature Comm. 12, 6087 (2021)
On the Electron Pairing Mechanism of Copper-Oxide High Temperature Superconductivity
We discovered that charge-transfer superexchange is the electron-pairing mechanism in hole-doped cuprate superconductors.
Proc. Nat. Acad. Sci. 119, 2207449119 (2022).
Identification of a Nematic Pair Density Wave State in Bi2Sr2CaCu2O8+x
Sanned Josephson tunnelling microscopy (SJTM) reveals interplay of PDW and superconductive (DSC) states in Bi2Sr2CaCu2O8+x discovering Q=0 nematic PDW state with Ising domains.
Proc. Nat. Acad. Sci. 119, 2206481119 (2022)
Interplay of hidden orbital order and superconductivity in CeCoIn5
Sublattice-resolved QPI visualization in the superconducting Kondo material CeCoIn5 revealed two orthogonal QPI patterns centered at impurity atoms segregated by sublattice - and thus hidden orbital order .
Nature Comm. 14, 2984 (2023)
Discovery of Orbital Ordering in Bi2Sr2CaCu2O8+x
We introduced sublattice resolved E(r) imaging techniques to CuO2 studies and discovered powerful intra-unit-cell rotational symmetry breaking of E(r), with energy-level splitting 50 meV scale, thus orbital ordering.
Nature Materials 23, 492 (2024)
Visualizing the atomic-scale origin of metallic behaviour in Kondo insulators
We discovered nanometer-scale “puddles” of metallic conduction electrons in the topological Kondo insulator samarium hexaboride (SmB6), implying that its three-dimensional quantum oscillations arise from Kondo-lattice defects.
Science 379, 1214 (2023)
Detection of a Pair Density Wave State in UTe2
Within mVITO, we visualized the Ute2 pairing energy-gap and detected three PDWs, that are indistinguishable from the wavevectors of the prevenient CDW. This PDW state is evidently a topological spin-triplet pair density wave.
Nature 618, 921 (2023)
Pair Wavefunction Symmetry in UTe2 from Zero-Energy Surface State Visualization
We discover a zero-energy Andreev conductance maximum at the (0-11) crystal termination categorizing UTe2 as the odd-parity non-chiral B3u state.
Science 388, 938-944 (2025)
Odd-Parity Quasiparticle Interference in the Superconductive Surface State of UTe2
We visualize quasiparticle interference patterns of its QSB, consistent with bulk Δ(k) exhibiting B3u symmetry.
Nature Physics ,
2025(s’ouvre dans une nouvelle fenêtre).
